South Dakota Tax Tables for 2018
The 2018 South Dakota Tax Tables summarise the state-level rules applied to wages, deductions, credits and taxable income. These tables match the rules used by the South Dakota State Tax Calculator 2018.
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South Dakota Tax Tables for 2018
The tables below outline the income tax structure, deduction amounts, state-level credits and payroll-related rules used for South Dakota in 2018. South Dakota applies a flat income tax to this filing status. All taxable income is taxed at the same rate, with no marginal brackets. This table shows the single rate used in calculations. To understand how flat tax tables differ from progressive systems, see our Tax Tables guide.
Single – Flat Income Tax (2018)
A single flat tax rate applies to all taxable income for Single filers.
| Bracket | Range | Rate |
|---|---|---|
| 1 | 0 and over | 0% |
Married filing jointly – Flat Income Tax (2018)
A single flat tax rate applies to all taxable income for Married filing jointly filers.
| Bracket | Range | Rate |
|---|---|---|
| 1 | 0 and over | 0% |
Married filing separately – Flat Income Tax (2018)
A single flat tax rate applies to all taxable income for Married filing separately filers.
| Bracket | Range | Rate |
|---|---|---|
| 1 | 0 and over | 0% |
Head of household – Flat Income Tax (2018)
A single flat tax rate applies to all taxable income for Head of household filers.
| Bracket | Range | Rate |
|---|---|---|
| 1 | 0 and over | 0% |
Widowed – Flat Income Tax (2018)
A single flat tax rate applies to all taxable income for Widowed filers.
| Bracket | Range | Rate |
|---|---|---|
| 1 | 0 and over | 0% |
South Dakota Standard Deduction(2018)
State-level standard deduction amounts for each filing status.
| Filing Status | Amount |
|---|---|
| Single | $0 |
| Married filing jointly | $0 |
| Married filing separately | $0 |
| Head of household | $0 |
| Widowed | $0 |
South Dakota Tax Tables for Related Years
These related years are often reviewed together for comparing bracket changes, deductions and South Dakota updates:
Frequently Asked Questions
Do 529 plan contributions reduce South Dakota tax?
There’s no South Dakota income tax; 529 growth is tax-advantaged federally and in many states, but no state income tax deduction applies here.
How do capital gains affect my paycheck in South Dakota?
Capital gains are taxed federally (not by South Dakota). They don’t impact W-2 payroll withholding unless you adjust your W-4 for expected tax.
Can I estimate employer payroll filings?
Use Form 941 (quarterly) or Form 944 (annual). FUTA: Form 940.
Where do I report foreign earned income exclusions?
Use Form 673/FEIE on your federal return; South Dakota has no income tax return.
Do rental properties change my payroll tax?
Not directly. Rental income/loss is reported on Schedule E for federal tax; South Dakota has no income tax return.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.